All languages I know of discretize qualities when trying to describe them. For example, languages generally sample a few words for describing a range of continous things like feelings ('terrible', 'bad', 'neutral', 'good', 'wonderful') or colors ('red', 'blue', 'yellow', etc).
This feature, however, does not seem to be a direct limitation from speech, as we could modulate aspects like pitch, lenght of vowels or volume of words to be able communicate such things in a continous way. Are there examples of languages that do so, or anybody has explanations for why those aren't observed in general?
why those aren't observed in general?- the most plausible explanation is that there is simply no need for that(?) What is established in a language is what the speakers of that language need to cover their basic needs. A colour can be expressed precisely using RGB encoding or its wavelength value in nanometers - professionals use this, most people don't need this. – tum_ May 20 '19 at 14:23